PayPal Button Manager API (NVP)

HTML Variables for PayPal Payments StandardHTML Variables for Individual ItemsANameRequiredorOptionalDescriptionCharacterLengthtax Optional Transaction-based tax override variable. Set this variable to aflat tax amount to apply to the payment regardless of thebuyer’s location. This value overrides any tax settings set inyour account profile. Valid only for Buy Now and Add toCart buttons. Default – Profile tax settings, if any, apply.tax_rate Optional Transaction-based tax override variable. Set this variable to apercentage that applies to the amount multiplied by thequantity selected during checkout. This value overrides anytax settings set in your account profile. Allowable values arenumbers 0.001 through 100. Valid only for Buy Now andAdd to Cart buttons. Default – Profile tax settings, if any,apply.6undefined_quantityOptional1 – allows buyers to specify the quantity.• Optional for Buy Now buttons• Not used with other buttons1weight Optional Weight of items. If profile-based shipping rates areconfigured with a basis of weight, the sum of weight valuesis used to calculate the shipping charges for the payment.Allowable values are decimals numbers, with 2 significantdigits to the right of the decimal point.weight_unit Optional The unit of measure if weight is specified.Allowable values are:• lbs• kgsThe default is lbs.on0 Optional First option field name and label. The os0 variable containsthe corresponding value for this option field. For example, ifon0 is size, os0 could be large.• Optional for Buy Now, Add to Cart, Subscribe,Automatic Billing, and Installment Plan buttons• Not used with Donate or Buy Gift Certificate buttonson1 Optional Second option field name and label. The os1 variablecontains the corresponding value for this option field. Forexample, if on1 is color then os1 could be blue.You can specify a maximum of 7 option field names (6 withSubscribe buttons) by incrementing the option name index(on0 through on6).• Optional for Buy Now, Add to Cart, Subscribe,Automatic Billing, and Installment Plan buttons• Not used with Donate or Buy Gift Certificate buttons6464Button Manager NVP API April 2012 55